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Publication . Conference object . 2014

Wavelength calibration from 1-5μm for the CRIRES+ high-resolution spectrograph at the VLT

Ulf Seemann; Guillem Anglada-Escudé; Dietrich Baade; Paul Bristow; Reinhold J. Dorn; Roman Follert; D. Gojak; +22 Authors
Published: 06 Aug 2014 Journal: SPIE Proceedings (issn: 0277-786X, Copyright policy )
Publisher: SPIE
CRIRES at the VLT is one of the few adaptive optics enabled instruments that offer a resolving power of 105 from 1 − 5 μm. An instrument upgrade (CRIRES+) is proposed to implement cross-dispersion capabilities, spectro-polarimetry modes, a new detector mosaic, and a new gas absorption cell. CRIRES+ will boost the simultaneous wavelength coverage of the current instrument (~ γ/70 in a single-order) by a factor of 10 in the cross-dispersed configuration, while still retaining a ~> 10 arcsec slit suitable for long-slit spectroscopy. CRIRES+ dramatically enhances the instrument’s observing efficiency, and opens new scientific opportunities. These include high-precision radial-velocity studies on the 3 m/s level to characterize extra-solar planets and their athmospheres, which demand for specialized, highly accurate wavelength calibration techniques. In this paper, we present a newly developed absorption gas-cell to enable high-precision wavelength calibration for CRIRES+. We also discuss the strategies and developments to cover the full operational spectral range (1 − 5 μµm), employing cathode emission lamps, Fabry-Perot etalons, and absorption gas-cells.
Subjects by Vocabulary

Microsoft Academic Graph classification: Wavelength Exoplanet Absorption (electromagnetic radiation) Polarimetry Optics business.industry business Adaptive optics Spectroscopy Physics Spectrograph Calibration

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Conference object . 2014
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